检索结果-南通市图书馆

Nano Research 2023年第4期16卷 4546-4553页

作者： Haojing Wang Xiaodong Wu Guanyu Liu Shuyang Wu rong Xu School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingapore 637459Singapore College of Materials Science and Engineering Nanjing Tech UniversityNanjing 210009China Cambridge Centre for Advanced Research and Education in Singapore(CARES) Singapore 138602Singapore

Utilizing electrocatalytic CO_(2)reduction(ECR)to decrease the carbon footprint has been regarded as a promising ***,we report the synthesis of Ni nanoclusters(NCs)of below 2 nm highly dispersed on N-doped carbon using a Ni/Zn bimetallic metal-organic framework(MOF)*** size and the content of the Ni catalyst can be effectively controlled by varying the Ni:Zn ratio in MOF ***-NH2 group in MOF ligand critically influences the size of Ni catalyst,as well as the property of the carbon *** the optimum ratio of 1:150,Ni NCs with an average size of 1.9 nm anchored on pyridinic N-rich carbon were obtained after MOF *** resultant catalyst exhibits a high Faradaic efficiency for CO(FECO,98.7%)and considerable partial current density for CO(JCO,−40.4 mA·cm^(−2))at−0.88 V versus reversible hydrogen electrode(RHE).Benefiting from the synergistic effect of small Ni clusters and their optimal interaction with the carbon support,the catalyst displays exceptional long-term *** functional theory(DFT)calculations carried out for the three model structures confirm that Ni NCs anchored on N-doped carbon facilitate the easier formation of*COOH intermediate and faster electron transfer rate compared with the large-sized Ni particles represented by Ni(111)and the N-doped carbon without Ni.

关键词： electrochemical CO_(2)reduction metal-organic framework N-doped carbon nanocluster

Effect of Dual-Tasks Walking on Human Gait Patterns

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2022年第4期19卷 991-1002页

作者： Xiyuan Zhang Ke rong Guangming Chen Aihong Ji Yawei Song Lab of Locomotion Bioinspiration and Intelligent Robots College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and Astronautics29 Yudao StreetNanjing 210016China Olympic College Communication University of China NanjingNanjing 211162China Department of Sports Health Sciences Nanjing Sport Institute8 Linggusi RoadNanjing 210014China Centre of Scientific Experiment Nanjing Sport InstituteNanjing 210014China

A human gait pattern conformed to the law of the inverted pendulum and could be described by the movement of its center of mass(COM).A sinusoidal function based on an inverted pendulum was used to plan the COM trajectory of humanoid robots for gait ***,studying the human dual-tasks gait pattern is essential for improving the gait adaptability of humanoid *** well-known humanoid robot prototypes can complete stable walking,running,jumping,and other movements closely mimicking human *** study provides a theoretical reference for the gait planning and design of humanoid robots by comparing differences in the stride time,cadence,step length,step width,stride length,walking speed and COM movement during single-and dual-tasks *** showed no significant difference in the time *** dual-tasks walking,the walking speeds decreased(P=0.001)and the COM sidewise movement increased,indicating an enhancement in the automatic motion rhythm in cognitive *** can easily select new different speeds to better adapt to the competition of attention *** enhance the adaptability of humanoid robots to the COM offset,the independent motion of the hip joint separated from the trunk and lower limbs must be considered in the robot design.

关键词： Gait analysis Kinematics COM trajectory Kinesiology

Reduction of Tat-interacting Protein 30 Expression Could be a Prognostic Marker in Bladder Urothelial Cancer

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2018年第2期131卷 188-193页

作者： Ye-Ping Li Jian-Fang Zhu Ka-TeHuang rong-rong Wang Bing Cai Hui Xie Hong-De Chen Department of Urology The First Affiliated Hospital of Wenzhou Medical University Wenzhou Zhejiang 325000 China Department of Vascular Surgery The Second Hospital of Shaoxing City Shaoxing Zhejiang 312000 China Department of Pathology The First Affiliated Hospital of Wenzhou Medical University Wenzhou Zhejiang 325000 China

Background： Tat-interacting protein 30 （TIP30） has been reported to be a tumor suppressor, with reduced or absent expression in various tumors. However, its role in bladder urothelial cancer （BUC） has not been investigated. Therefore, herein, we investigated the expression of T1P30 protein in BUC and normal bladder mucosa and the clinical significance of TIP30 expression in the prognosis of BUC. Methods： We reviewed data from 79 cases of BUC and 15 adjacent tissue samples from 79 patients treated at our institution between 2004 and 2007. TIP30 expression was examined by immunohistochemistry. The relationship between TIP30 expression and tumor stage, histological grade, and survival was analyzed. Differences between groups were evaluated using the t-test or matched-pairs test, and differences in the survival rates were analyzed with the log-rank test. Results： TIP30 protein expression was significantly reduced in BUC tissue （t = -6.91, P 〈 0.05） compared with normal tissue samples, and in invasive bladder cancer （t = 10.89, P 〈 0.05） compared with superficial bladder cancer. TIP30 protein expression differed significantly among different differentiated groups classified either according to the World Health Organization （2004, F = 17.48, P 〈 0.01） or World Health Organization （1973, F = 10.68, P 〈 0.01）. TIP30 protein expression was significantly reduced in high-grade papillary urothelial carcinoma compared with papillary urothelial neoplasm of low malignant potential （P 〈 0.05） and low-grade papillary urothelial carcinoma （P 〈 0.05）. Meanwhile, TIP30 protein expression was significantly reduced in Grade 111 BUC, compared with Grade I （P 〈 0.05） and Grade 11 （P 〈 0.05）. Patients with low T1P30 expression showed a higher incidence of disease progression than those with high TIP30 expression （t - 2.63, P 〈 0.05）. Kaplan-Meier survival analysis showed a strong positive relationship between TIP30 expression and overall survival （OS）（x^2 = 17.29, P 〈 0.05）. Conclusions： T

关键词： Bladder Urothelial Cancer Overall Survival Time Tat-interacting Protein 30

社区“数智适老化”服务的要素模型——基于北京、天津、上海、深圳和浙江五地政策文本的扎根分析

在线全文

学校读者我要写书评

暂无评论

信息技术与管理应用 2024年第1期3卷 149-163页

作者：从容杜孝珍王墁霍莉天津师范大学政治与行政学院

基于老年群体需求,以“智慧适老”为切口,持续推进“适老”服务智能化发展,在“适老”的过程中为老人“赋权”,这是社区“数智适老化”服务与传统养老服务的主要区别。本研究以扎根理论为研究方法,通过系统分析北京、天津、上海、深圳... 详细信息

基于老年群体需求,以“智慧适老”为切口,持续推进“适老”服务智能化发展,在“适老”的过程中为老人“赋权”,这是社区“数智适老化”服务与传统养老服务的主要区别。本研究以扎根理论为研究方法,通过系统分析北京、天津、上海、深圳和浙江五地的政策文本,建构社区“数智适老化”服务的要素模型,即现实条件、需求构成、政府职能、技术赋权、技术赋能、协同治理。衡量社区“数智适老化”服务水平应从前因背景、内外动力、路径选择三方面考虑。

关键词：数智化社区适老化服务要素模型扎根理论

Microstructure and Mechanical Properties of TiC-Reinforced Al–Mg–Sc–Zr Composites Additively Manufactured by Laser Direct Energy Deposition

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2022年第3期35卷 411-424页

作者： rong Xu Ruidi Li Tiechui Yuan Hongbin Zhu Ping Li State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083.China CRRC Industrial Academy Co. LtdBeijing 100070China

In order to refine the microstructure and improve the performance of direct energy deposited(DED)additively manufactured Al–Mg–Sc–Zr alloy,TiC-modified Al–Mg–Sc–Zr composites were prepared by DED and the effect of TiC content on the microstructure and performance was *** the absence of TiC particle,the microstructure of Al–Mg–Sc–Zr alloy prepared by DED consisted of fine grains with average size of 8.36μm,and well-dispersed nano-Al;(Sc,Zr)particles inside the grains and Mg;Si phase along the grain *** the addition of 1 wt%TiC,the microstructure of TiC/Al–Mg–Sc–Zr prepared by DED became finer apparently compared with that without TiC;while the further increase of TiC content to 3 wt%,the microstructure of TiC/Al–Mg–Sc–Zr prepared by DED became coarser with appearance of a new kind of needle-like(Ti,Zr);Si;***,the addition of TiC decreased the porosity of Al–Mg–Sc–Zr prepared by ***,after the addition of TiC,the tensile strength increased from 283.25 MPa to 344.98–361.51 MPa,and the elongation increased from 3.61%to 9.58–14.10%.The potential mechanism of the microstructure evolution and strength improvement was *** research will provide new insights into the available metal matrix composites by laser additive manufacturing(LAM).

关键词： Laser additive manufacturing Aluminum matrix composites Mechanical property Microstructure

“全景敞视”视域下中国网络舆论监督现状及优化路径

在线全文

学校读者我要写书评

暂无评论

新闻知识 2024年第2期476卷 19-24,93,94页

作者：刘立荣胡孝凤天津中医药大学文化与健康传播学院

互联网时代,网民在推动事件发展及解决方面发挥着重要作用,形成“全景敞视”式网络舆论监督结构。本文利用文献法、案例分析法和逻辑思辨法探究“全景敞视”式的网络舆论监督模式的意义和影响,进一步了解这种监督模式的局限,分析其带来... 详细信息

互联网时代,网民在推动事件发展及解决方面发挥着重要作用,形成“全景敞视”式网络舆论监督结构。本文利用文献法、案例分析法和逻辑思辨法探究“全景敞视”式的网络舆论监督模式的意义和影响,进一步了解这种监督模式的局限,分析其带来的网络暴力、舆论审判等问题,研究网络舆论监督在公共事件处理中的真实效用和具体限度。提出“全景敞视”视域下网络舆论监督的优化路径:舆论监督应该借助但不依赖“全景敞视”式网络舆论监督模式;加强法律约束,构建完善的舆论监督体系;提升媒体效能,形成舆论监督合力;提高网民素养,促进舆论监督的有序化,为推动社会事件顺利解决提供健康的舆论环境,营造清朗的网络空间。

关键词：全景敞视网络舆论监督优化路径

节日文化实践中的民族交往交流交融——以云南澜沧拉祜族九皇会为例

在线全文

学校读者我要写书评

暂无评论

青海民族大学学报（社会科学版） 2024年第3期50卷 23-29页

作者：贾淑凤刘劲荣云南民族大学云南昆明650504

民族节日庆典和仪式操演既是民族文化展示的窗口,又是民族文化不断交融、创新和再生产的过程。九皇会最初与道教和佛教文化有关,自明末清初传入云南澜沧赛罕拉祜族地区后,逐渐与拉祜族文化融合,形成了具有地方特色的祈福祭祀活动和年俗... 详细信息

民族节日庆典和仪式操演既是民族文化展示的窗口,又是民族文化不断交融、创新和再生产的过程。九皇会最初与道教和佛教文化有关,自明末清初传入云南澜沧赛罕拉祜族地区后,逐渐与拉祜族文化融合,形成了具有地方特色的祈福祭祀活动和年俗礼仪。随着时代的变迁,九皇会也从单纯的民间祈福祭祀活动演变成了大众化的民俗节日庆典,实现了民族节日文化习俗的共享与文化赓续,成为当下拉祜族、汉族、哈尼族、佤族等民族交流互动的平台。作为跨越村落和族群的多民族共享的传统节日,九皇会及其文化实践为各民族交往交流交融提供了一个生动的案例。

关键词：九皇会文化实践民族交往交流交融澜沧拉祜族

Interconnected Bi_(5)Nb_(3)O_(15)@CNTs network as high-performance anode materials of Li-ion battery

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第10期41卷 3401-3411页

作者： Xue-Zhong Li Nan Zhang Yu-rong Wu Qin-Zhi Lai Yan-rong Zhu Jun-Hong Zhang Ping Cui Ting-Feng Yi School of Materials Science and Engineering Northeastern UniversityShenyang110819China School of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan243002China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao066004China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology College of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng252059China

In this work,the facile carbon nanotubes(CNTs) modulation strategy was successfully used to fabricate Bi_(5) Nb_(3) O_(15)@CNTs composites as anode materials for lithium-ion battery by a simple solid-state *** introduction of CNTs does not change the structure of the Bi_(5) Nb_(3) O_(15) materials,the Bi_(5) Nb_(3) O_(15) particles are decorated on a three-dimensional CNTs network,and the high conductive network promotes transfer of electron/ion and relieve the volume change of Bi_(5) Nb_(3) O_(15).The Bi_(5) Nb_(3) O_(15)@CNTs(8 wt%) electrode shows a superior rate capability with charge(discharge) capacities of 490(898.7),379.1(401.6),311.3(326.9),276.5(285.5) and 243.4(252)mAh·g^(-1) at 50,100,200,300 and 500 mA·g^(-1),***,the Bi_(5) Nb_(3) O_(15) only shows charge(discharge) capacities of 431(772.6),278.6(309.9),193.1(213.7),160.8(171.1),129.9(139.1) mAh·g^(-1) at the corresponding rates,*** excellent rate capability of Bi_(5) Nb_(3) O_(15)@CNTs can be ascribed to the homogeneous distribution of Bi_(5) Nb_(3) O_(15) particles in the CNTs conductive network and the enhancement of ***,the CNTs modulation can be considered as an effective strategy to enhance electrochemical performances of Bi_(5) Nb_(3) O_(15) materials.

关键词： Bi_(5)Nb_(3)O_(15) Carbon nanotubes(CNTs) Anode Li-ion battery(LIB)

Microstructural evolution and stress state related to mechanical properties of electron beam melted Ti-6Al-4V alloy modified by laser shock peening

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第15期47卷 153-161页

作者： Liang Lan Xinyuan Jin Shuang Gao Bo He Yonghua rong Research Center of High-temperature Alloy Precision Forming School of Material EngineeringShanghai University of Engineering ScienceShanghai 201620China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

This work characterizes microstructural evolutions of electron beam melted(EBM) Ti-6 Al-4 V alloy modified via laser shock peening(LSP).The depth stress distribution and tensile properties of EBM Ti-6 Al-4 V alloy were measured before and after *** results indicate that microstructure consists of β phase with 7.2%±0.4% vol.% and balance α lamellar in EBM sample,and the α lamella was refined into nano-equiaxed grains and submicro-equiaxed grains after *** dominant refinement mechanism is revealed during *** faults were found in the LSP-treated sample,and their corresponding planes were determined as(0001) basal plane,(1010) prismatic plane,and(1011) pyramidal plane obtained by high resolution transmission electron *** subgrains and high-angle grains formed during dynamic recrystallization were identified by selected area electron diffraction *** LSP treatment produces a significantly residual compressive stress approximately-380 MPa with the depth of compressive stress layer reaching 450 μ*** and elongation of the EBM sample were significantly increased after *** strength and ductility enhancements are attributed to compre s sive stress,grain refinement and grain gradient distribution of α phase.

关键词： Electron beam melting Ti-6Al-4V alloy Laser shock peening Microstructural evolution Stress state Mechanical properties

基于改进的多目标粒子群算法的分布式光伏电源优化配置

在线全文

学校读者我要写书评

暂无评论

新余学院学报 2024年第2期29卷 58-66页

作者：涂福荣刘克天厦门海洋职业技术学院海洋机电学院福建厦门361100 南京工程学院电力工程学院江苏南京211167

针对不合理的分布式光伏电源选址定容给配网造成电压质量降低、功率倒送等问题,建立计及光照条件的配电网有功网损最小、电压偏差最小、投资成本最低的多目标选址定容模型,并提出一种改进的多目标粒子群算法求解该模型。该算法采用非线... 详细信息

针对不合理的分布式光伏电源选址定容给配网造成电压质量降低、功率倒送等问题,建立计及光照条件的配电网有功网损最小、电压偏差最小、投资成本最低的多目标选址定容模型,并提出一种改进的多目标粒子群算法求解该模型。该算法采用非线性惯性权重和学习因子提高算法的收敛精度,引入早熟扰动因子增强算法跳出局部最优的能力,提出拥挤距离更新策略,以保证Pareto解集分布的均匀性和广泛性;通过标准测试函数验证所提算法的优越性;最后,基于IEEE-69节点系统进行分析。仿真结果表明,所建模型在兼顾配电网经济性和安全性的同时,可有效将分布式光伏电源配置在光照资源丰富的地区。

关键词：分布式光伏电源选址定容多目标粒子群算法配电网